/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hama.ml.recommendation;

import org.apache.hadoop.io.DoubleWritable;


/**
 * User preference for given item
 * @param <U> - user id type, usually long
 * @param <I> - item id type, usually long
 */
public class Preference<U, I> {
  protected U userId;
  protected I itemId;
  protected DoubleWritable value = null;

  public Preference(U userId, I itemId, double value) {
    this.userId = userId;
    this.itemId = itemId;
    this.value = new DoubleWritable(value);
  }
  public U getUserId() {
    return userId;
  }
  
  public void setUserId(U userId) {
    this.userId = userId;
  }
  
  public I getItemId() {
    return itemId;
  }
  
  public void setItemId(I itemId) {
    this.itemId = itemId;
  }
  
  public DoubleWritable getValue() {
    return value;
  }
  
  public void setValue(double value) {
    this.value = new DoubleWritable(value);
  }
}
